Genus: Cardiocephalus BROILI, 1904
Etymology:
= Gymnarthrus CASE, 1910
Etymology:

Species: sternbergi BROILI, 1904
Etymology:

Holotype: Alte Akademie, Munich.

Locality: Coffee Creek, Baylor County, Texas.

Horizon: Arroyo Formation, Lower Clear Fork Group.

Biostratigraphy: Land-vertebrate faunachron lower D.

Age: Middle Leonardian stage, upper Rotliegendes, Early Permian.

Material: Skull.

Referred specimens:

A second skull now lost.

 

BOLT & DEMAR, 1983

Locality: Fort Sill Locality, southwestern Oklahoma.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material:

FM Pr 1108-1130: Dentary.

FM PR 6061: Transverse serial sections of posterior part of right dentary consisting of 9 slides sections cut at 1 mm intervals.

FM 6064: 3 transverse sections through a dentary fragment consisting of 3 slides, cut at various intervals.

KU 55552 to 55554 to 55564: Dentaries and maxillae.

TMM 40882-20839: 1 specimen.

 

CARROLL & GASKILL, 1978

Locality: Beaver Creek, Wilbarger County, Texas.

Horizon: Arroyo Formation, Lower Clear Fork Group.

Biostratigraphy: Land-vertebrate faunachron lower D.

Age: Middle Leonardian stage, upper Rotliegendes, Early Permian.

Material:

FM-UR 1047: Skull.

 

OLSON, 1967

Locality: Fort Sill, OMNH Locality V51, Dolese Brothers limestone quarry at Richards Spur, Fissure Fills, just west of U.S. Highways 62 & 281, 10.5 miles south of Apache, 6 miles north of Fort Sill, SW 1/2, Sec. 31, T4N, R11W, Comanche County, Oklahoma.

Horizon: Willington Formation (Garber Formation), Summer Group, Arbuckle limestone, (Probably equivalent to the Arroyo Formation of Texas).

Biostratigraphy:

Age: Middle Leonardian stage, upper Rotliegendes Epoch, Early Permian.

Material:

KU 9929: Scapulocoracoids.

KU 9930: Scapulocoracoid.

KU 9931: Sacral rib.

KU 9932: Sacral rib.

KU 9933: Pelvis.

KU 9934: Pelvis.

YPM 3681-3684, 3700, 3702, 3704: Lower jaws.

YPM 3689: Skull.

YPM 3805-3812: Humeri.

YPM 3813-3816: Tibiae.

YPM 3818: Ulna.

YPM 3819-3824: Vertebrae.

YPM 3826-3829: Fibulae.

YPM 3830-3833: Femora.

YPM 3834-3837: Radii.

YPM 3844, 3868: Scapulocoracoids.

YPM 3846, 3850: Pubes.

 

ZIDEK, JOHNSON, MAY & CLABORN, 2004

Locality: OMNH V 173, Northeast Frederic site of Simpson, (1976, 1979), Tillman County, Oklahoma.

Horizon: Garber Sandstone, Upper part of the Sumner Group, possibly equivalent to the Lower Arroyo Formation, Lower Clear Fork Group.

Biostratigraphy: Land-vertebrate faunachron lower D.

Age: Middle Leonardian stage, upper Rotliegendes, Early Permian.

Material:

Number: Not given:


Locality: OMNH V 247, found near Lake Frederick site, Tillman County, Oklahoma.

Horizon: Garber Sandstone, Upper part of the Sumner Group, possibly equivalent to the Lower Arroyo Formation, Lower Clear Fork Group.

Biostratigraphy: Land-vertebrate faunachron lower D.

Age: Middle Leonardian stage, upper Rotliegendes, Early Permian.

Material:

Number: Not given:

 

= Cardiocephalus cf sternbergi DALY, 1973

Locality: South Grandfield, southern Tillman County, Oklahoma.

Horizon: Hennessey Formation, (Arroyo equivalent), Low Clear Fork Group.

Biostratigraphy:

Age: Leonardian Stage, Lower Rotliegendes Epoch, Early Permian.

Material:

FM UR 2296: Skull and jaw.

FM UR 2297: Fragmentary skull.

FM UR 2387: A partial mandible.

FM UR 2299-2302: Fragmentary skeletons.

 

= Gymnarthrus willoughbyi CASE, 1910
Etymology:

Holotype: AMNH 4892

Locality: Baylor County, near the head of Coffee Creek, Texas.

Horizon: A red clay above the Wichita Conglomerate.

Biostratigraphy:

Age: Early Permian.

Material: Skull.

Paratype:

AMNH 4763

Locality: Unknown, Texas.

Horizon:

Biostratigraphy:

Age: Early Permian.

Material: Skull.

_____________________________________________________________________________________

Species: peabodyi (GREGORY, PEABODY & PRICE, 1956)
Etymology:
= Cardiocephalus cf. sternbergi GREGORY, PEABODY & PRICE, 1956
= Euryodus peabodyi (GREGORY, PEABODY & PRICE, 1956) DALY, 1973

Holotype: OUSM 10001 (OU 1034 of GREGORY, PEABODY & PRICE 1956)

Locality: Fort Sill, OMNH Locality V51, Dolese Brothers limestone quarry at Richards Spur, Fissure Fills, just west of U.S. Highways 62 & 281, 10.5 miles south of Apache, 6 miles north of Fort Sill, SW 1/2, Sec. 31, T4N, R11W, Comanche County, Oklahoma.

Horizon: Willington Formation (Garber Formation), Summer Group, Arbuckle limestone, (Probably equivalent to the Arroyo Formation of Texas).

Biostratigraphy:

Age: Middle Leonardian stage, upper Rotliegendes Epoch, Early Permian.

Material: Skull and almost complete skeleton lacking only the right forelimb, and the real limbs and tail.

Referred material:

YPM 3689: Skull and fragmentary skeleton.

KUVP 8967: Nearly complete skull and jaws.

AMNH 2470: Palatine.

AMNH 2471: Maxilla.

MCZ 4352: Dentary.

MCZ 3692: Humerus.

MCZ 3693: Tibia.

YPM 5834: Pelvic girdle.